Blackbody problem

Hi, im having trouble with the last question in my assignment. It's on blackbody radiation and total power per area and whatnot. those questions i was able to do fine, however when i came to this problem i was a little lost..

here it goes, i'll type the whole thing out..

"The most important energy source in so called main sequence stars is fusion of four protons into He nuclei.
A star has a radius r
How many he nuclei does the star produce per second if He production is the dominant energy source?
Use the Q value for the conversion 4H ->He to estimate the amount of raditation energy generated by hydrogen burning, and assume that the radiation energy output per second corresponds to the energy generated by hydrogen burning in a second."

"The most important energy source in so called main sequence stars is fusion of four protons into He nuclei.
A star has a radius r
How many he nuclei does the star produce per second if He production is the dominant energy source?
Use the Q value for the conversion 4H ->He to estimate the amount of raditation energy generated by hydrogen burning, and assume that the radiation energy output per second corresponds to the energy generated by hydrogen burning in a second."

Where did you get this problem? First of all, how do 4 protons fuse to become one He nucleus? Shouldn't it be 2 deuterons fuse to become a He nucleus?

You appear to be missing an essential piece of information: the surface temperature of the star. Without that, it is not possible to answer the question.

Where did you get this problem? First of all, how do 4 protons fuse to become one He nucleus? Shouldn't it be 2 deuterons fuse to become a He nucleus?

You appear to be missing an essential piece of information: the surface temperature of the star. Without that, it is not possible to answer the question.

AM

Sure that's possible 4 H fuse to form 4He2 .
through Carbon Nitrigen Oxygen cycle
Well I can't remeber whole thing but you can find it in any text book.
Also a minimum temperature is required at core for this process ro take place
But surface temperature would be much lesser